ASTROSAT CZTI

Data Quality Report

Orbit 55786

Creation date: 2026-01-19T19:21:01.869491
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_127T10_9000006542_55786cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55786cztM0_level2_quad_clean.evt
Size (bytes)602,438,400101,577,600
Size574.5 MB 96.9 MB
Events in quadrant A6,587,738614,588
Events in quadrant B3,733,914740,346
Events in quadrant C3,481,412660,006
Events in quadrant D7,929,010550,754

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0244800
B0155510
C0161040
D0285230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A732489212.179137%
B7325370.505119%
C7325741.010239%
D7325113415.481229%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7324 7324 736 736 10.05% 10.05%
B 7325 7325 7 7 0.10% 0.10%
C 7325 7325 70 70 0.96% 0.96%
D 7325 7325 997 997 13.61% 13.61%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 15 32 2961399 15953.3 740 719 185.6
A 0 8 280830 1509.35 740 719 185.6
A 8 192 260068 1397.47 740 719 185.6
B 5 172 555646 3287.63 776 747 168.8
B 7 252 60540 354.26 776 747 168.8
B 10 247 22369 128.1 776 747 168.8
C 14 96 250474 1192.17 762 754 209.5
C 10 22 115989 550.13 762 754 209.5
C 15 200 70433 332.65 762 754 209.5
D 11 129 3606122 17658.66 726 697 204.2
D 8 245 843188 4126.36 726 697 204.2
D 11 224 299004 1461.05 726 697 204.2

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter